Transient stability enhancement in multiple‐microgrid networks by cloud energy storage system alongside considering protection system limitations

The gas turbine synchronous generators (GTSGs) are widely deployed as distributed generations (DGs) in countries with massive natural production owing to their low prices. However, due the inertia time constants of these synchronous-based DGs, they more susceptible power grid faults which stands a transient stability issue networks multiple microgrids (MGs). On other hand, cloud energy storage system (CESS) is new concept that centralizes individual one or MGs. Here, employment CESS synchronverter connections creates suitable opportunity for improving network by providing higher inertia. This while fault current contribution synchronverter-based imperils protection constraints networks. Therefore, proper coordination index (PCI) considered conducted study identify optimal size through two-stage optimization algorithm preserves among protective devices. Finally, assayed calculation critical clearing (CCT) faults. Numerical studies carried out on IEEE 33-bus test system. Results discussed depth.